<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model.trim="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.trim.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男" name="sex">男</option>
        <option value="女" name="sex">女</option>
      </select>
    </div>
    <div>
      <button @click="add(id)">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in list" :key="item.id">
          <td>{{ item.id }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="put(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
  <script src="../vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        list: [{
          id: 1,
          name: "张三",
          age: 18,
          gender: "男"
        }],
        name: '',
        age: 0,
        sex: '男',
        selectPut: false,
        putId: 0,
        id: -1
      },
      methods: {
        add() {
          if (this.selectPut) {
            index = this.list.findIndex(item => item.id === this.putId)
            this.list[index].age = this.age,
              this.list[index].gender = this.sex,
              this.list[index].name = this.name
            this.selectPut = false
          } else {
            if (this.name && this.age) {
              this.list.push({
                id: this.list[this.list.length - 1].id + 1,
                name: this.name,
                age: this.age,
                gender: this.sex
              })
            } else {
              alert("请输入姓名和年龄")
            }
          }
          this.name = ""
          this.age = 0
          this.sex = '男'

        },
        del(id) {
          this.list = this.list.filter(item => item.id !== id)
        },
        put(index) {
          this.selectPut = true
          this.name = this.list[index].name
          this.age = this.list[index].age
          this.sex = this.list[index].gender
          this.putId = this.list[index].id
        }
      }
    })
  </script>
</body>

</html>